Sewing machine



May 23, 1933. H, J. BUCKING 1,910,200

' SEWING MACHINE Filed Aug. 27, 1930 2 Sheeis-Sheet 1 A r-L Int611507".-

I Hans J/fo flai [A22 Att May 23, 1933. H. J.- BUCKING 1,910,200

SEWING MACHINE Filed Aug. 27, 1930 2 Sheets- Shed 2 In V677 [0 rs. HansJa/zo5 Bic/Why Patented May 23, 1933 UNITED STATES HANS J'AKOlBBfiGKENG, OI AISFELD, GERMANY SEWING MACHINE Application filed August27, 1930. Serial No. 478,076.

My invention relates to sewing machines and more particularly to sewingmachines in which several seams 'on the same article are sewn insuccession on distinct sewing machine. units.

It is an object of my invention to improve a machine of this kind with aview to rendering the operators work more easy.

To this end I provide a chute or channel which extends from the firstsewing machine unit to the second unit and is adapted to receive thearticles from the first, and to conduct them toward the second unit. Theoperator of the second unit is supplied with the partly finishedarticlesby the chute and is able to present the articles to this unit bya single handling.

Heretofore in sewing articles of any kind requiring several successiveoperations, the

articles, for instance, sleeves, were piled up after having beenfinished on one of the units, and then delivered to the operator of thenext unit who took them from the pile and presented them-to the unit.This system is complicated and tedious. According to my invention thenecessity of piling the partly finished articles and of transporting thepiles to another unit is eliminated. The articles which have beenfinished on the first unit are delivered to the second unit on my chute,preferably under the action of the feed imparted to them by the firstunit on ,which they have been provided with the first seam in the caseof sleeves or similar articles and are provided with the second seam or.the second unit.

Obviously the operation of a machine equipped with my chute is greatlyfacilitated and its output is increased in proportion.

In the drawings afiixed to this specification and forming part thereof.sewing machines equipped with my novel chute are illustrateddiagrammatically by way of example.

In the drawings v Fig. 1 is an elevation of a machine equipped with astraight chute.

Fig. 2 is an end elevation of the machine,

partly in section on the line 1111 in Fig. 1,

Fig. 3 is a plan view of the machine, with its sewing-machine unitsomitted,

Fig. 4 is an elevation of a machine having a curved and partly tubularchute,

Fig. 5 is a plan view of the machine,

Fig. 6 is an elevation of a machine having a curved and'partly tubularchute like the machine illustrated in Figs. 4 and 5 but with the end ofthe chute turned back at the second unit, and v Fig. 7 is a plan view ofthe chute for the machine illustrated in Fi Referring now to the toFigs. 1-3, 1 is the frame of themachine, 2 and 3 are work benches, 4 isa table which is held above the work bench 2 by suitable stays 5, 6 isthe first unit which is secured to the work bench 2, and 7 is the secondunit which is secured to the work bench 3. 8 is the main driving shaft,9 and 10 are pulleys on the main driving shaft, 11 and 12 are belts onthe pulleys, 13 is a pulley below the work bench 2, 14 is a smallerpulley on the shaft of the pulley 13, 15 is a belt on this pulley and 16is a pulley 0nthe main shaft 17 of the unit 6 which is driven by thebelt 15. 18 is a pulley below the work bench 3 of the second unit 7which is driven by the belt 12, '19 is a pulley on the shaft of thepulley 18, 20 is a'quarter turn belt on the pulley 19, and 21 is themain shaft of the 6 drawings, and first second unit 7 which is drivenfrom the belt 20 through the medium of a. pulley 22. 23

is the work arm, and 24 is the needle bar of the second unit 7, theneedle bar of the first unit being positioned at 25, Fig. 3.

26 is a chute or channel which extends from the table-4 of the firstunit 6 to a point below the second unit7 and is preferably inclinedtoward this unit so that the articles slide in the chute by gravity. Theupper end of the chute is open and provided with lateral flanges 27 and28 for the reception of the articles from the first unit. Substantiallyat the point where it enters below the work bench 3, the chute istubular, being a flat tube 29 .of rectangular section as best seen inFig. 2. 30 is an open ejecting chute which extends from below thesecond-unit7 and is slightly inclined.

31, 32, Fig. 3, are the we halves" of a A chute 26 designed as describedwith preceding, and 33, 34 are the two halves of a succeedin sleeve. Thehalves 31, 32 have beensewn y thefirst unit 6 and are now 5 delivered tothe chute 26 while the halves 33, 34 are connected'along theirmatingedges. The thread of the first unit is not severed for the succeedingsleeveso that all sleeves are connected with each other as they leavethe first unit 6. From the first unit, each pair of halves which havebeen sewn on this unit aredelivered to the openend of the chute 26whereupon they enter the tube 29 and are extracted at the lower end ofthe tube. The inclination of the chute exerts a feeding action on thepartly finished sleeves and facilitates their extraction from the tube.As' the sleeves are connected by the thread the succeeding pair of halve33, '34 is moved to the end of'the tube 29 as the preceding pair ofhalves '31, 32'is extracted'from the tube.

The operator now lifts the partly finished sleeves, wraps theminto thesubstantially cylindrical'form of the finished sleeve and places them onthe work arm'23 of the sec- 0nd unit where their sides 33 and 34 aresewn together. From the unit 7, the finished sleeves are delivered tothe chute 30, and finally ejected. V Referring now to Figs. 4 and 5, theframe 1 with its work benches 2 and 3, the table'4 and the units 6 and 7are arranged substantially as described with reference to Figs. 1-3 butin this instance the unit 7 is arranged near the inner edge of thetableor work bench 3, and not near its outer edge as shown in Figs. 1-3. Thisreduces the overall length of the machine, and the operator of thesecond unit is :seated intermediate the work benches 2 and 3 instead ofbeing seated at the outer end. of the work bench 3, as in Figs. 1-3.

The chute or channel 26 is arranged with its front end at the level ofthe table 4, and is equipped with flanges 27 and 28,-and the tube 29, asdescribed. In this instance, how-- ever, the chute extends from thefirst unit 5 directly to the second unit. The end of the tube 29 issubstantially cylindrical and surrounds the arm 23 with itscylindricalportion. The chute :26, as described with reference to Figs. 1 to 3 hasa'tubular portion 29 of substantially rectangular section. This tubularportion in the machine illustrated in Figs. 4 and 5 is not straight atits outer end but carved into thecylinder surrounding the arm 23, andthe articles are extracted from the. substantially circular opening 48at the end of the cylinder. In this ma-nnerthe sleeve which issues fromthe end 48, is bentinto a cylinder about the arm 23 so that all theoperator has to do is to fold over the edges of the sleeve portion andto direct them to below the needle 24.

-reference to Figs 4 and. 5 ma also be adapted toa machine-showing t egeneral cylinder below-the slot 36, but it may be arranged at a distancefrom the end of the cylinder if desired.

Normally the feed of the articles is effected by their own weight, bythe feeding movement imparted to them by the first unit 6 and by thepull exerted by the second unit 7.

However, it may occur under certain conditions, and particularly underthe increased resistance opposed to the movement of the articles by theslot 48 in Figs. 4 and 5 and by the rebending of the cylindrical portionat the outlet end of the chute in Figs. 6 and 7 that this feed is notsuflicient for pulling the articles through. In such cases, extrafeeding means must be provided. An example is illustrated in Fig. 7 incombination with the turned-back chute illustrated in Fig. 6 butit isunderstood that feeding means of any kind may be adapted to any type ofchute'if required.

Referring now to Fig. 7, 38 and 39 are spur gears, friction pulleys, orany other parts adapted to be rotated which are supported in suitablebrackets 40 and 41 on the cylinder 35. Rotation may be imparted to the.members 38 and '39 by any suitable means, for instance by a connectionto a. rotary part of the unit 7. 42' and 43 are shafts connected to themembers 38 'and 39,

respectively, which are here shown as flexible shafts. Such shaftseliminate bevel gearings and a plurality of shafts connected by them,but I am not limited to the adaptation of flexible shafts. 44 are slotsin the top plate of the tube 29, 45 are bearings at the sides of theslots and 46 are friction discs which" are seated on stud shaftsconnected to the shafts 42 and .43, and mounted in the bearings 45. Thefriction discs 46 project into the tube 29 through the slots 44, engagethe sleeves inthe tubes, and feed them toward the cylinder 35.' Thefriction discs 46 are similar to the spur gears or the like 38; 39 andtheir edges, like those'of the members 38, 39, may be toothed, knurled,or otherwise so designed as to facilitate their engagement with thearticles to be fed. It may be desirable to vary the speed at which theseveral friction discs feed the articles. In this case the discs may bemade with .various diamethe articles in saidchannel.

ters or various speeds of rotation may be im- .parted to the shafts 42,43. The s 'ed of feeding may also be influencedby t e pull .exerted bythe operator which may not be uniform throughout the articles. In orderto prevent interference in cases of this kind, a yielding connection maybe provided between the shafts 42, 43, and their friction discs.

By way of example I have shown friction clutches 47 for the shafts 42and 43 in Fig. 7 by which the shafts are connected with the respectivefriction discs 46, but any other resilient means, or resilient shafts,may be provided.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim 1. Sewing mechanism comprising two sewing-machine units and achannel which is open andflanged at the end adjacent said first unit,and tubular at-the end adjacent said second unit, and is adapted toreceive articles from the first unit and to supply them to the secondunit.

2. Sewing mechanism comprising two sewing-machine units, a channelextending from the first to the second unit and adapt; ed to receivearticles from the first unit, a work arm on the second unit, and atubular part on said chute surrounding said work arm at a clearance.

3. Sewing mechanism comprising two sewing-machine units, a channelextending from the first to the second unit and adapted to receivearticlesfrom the first unit, and means operatively connected to one ofsaid units for feeding the articles in said channel.

4. Sewing mechanism comprising two sewing-machine units, achannel'extending from the first to the second unit and adapted toreceive articles from the first unit, and a means including a frictiondisc for feeding 5. Sewing mechanism comprising two sewing-machlneunlts, a channel extendlng from the first to the second unit and adaptedto receive articles from the first unit, means for feeding the articlesin said channel, and means including a yielding connection for operatingsaid feeding means from one of said units. 6. Sewing mechanismcomprising two sewing-machine units, a channel extending from the firstto the second unit and adapted to receive articles a friction discprojecting into said channel and means operatively connected to one ofsaid units for rotatin said friction disc.

7. Sewing mechanism comprising two sewing machine units, and a fixedfabric from the first unit,

receiving guide extending from "the first to the second unit and adaptedto directly receive articles from the first unit, the major portion ofthe guide being disposed at an angle to the horizontal.

8. Sewing mechanism comprismg two sewing machine units, and a foldingguide extending from one unit to another and directly receiving thematerial operated on by one unit and adapted to change the configurationof the fabric during the passage of the same to the other unit. i

9. Sewing mechanism com rising two sewing machine units, and a abricrecelving guide having a flat portion ad acent one unit, and a taperedcylindrical portion extending from the flat portion to the other unitfor changing fabric during t e passage of the same through the guide.

the configuration of the In testimony whereof aflix my signa- HANS JAKOB BUOKING.

